With company financial reports showing little improvement in demand, the Federal Reserve's third round of stimulus could boost prospects for faster sales gains in the second half of this year, Bloomberg reported. Revenue for companies in the Standard & Poor's 500 index has missed the aggregate analysts' estimate by about 0.7 percent, according to data compiled by Bloomberg, even though earnings have been better than projected. The Fed is purchasing $85 billion of Treasury and mortgage debt a month in its third round of quantitative easing.